Samsung note 2 Quick Start Manual page 64

To disconnect your device from the hub:
1. Access your device's AllShare Cast screen and
locate the current connection.
2. Tap the entry and select Stop.
To reconnect your device again to an existing
hub:
1. Locate the AllShare Hub (dongle) name
displayed at the bottom of the TV (showing the
tutorial). Ex: Name: Dongle - XXXXXX.
IMPORTANT: Verify the LED is not a solid blue. This indicates there is
2. Access your device's AllShare Cast screen and
tap the same hub/dongle name in the list.
3. Confirm the connection by making sure both
your TV and device show the same image/
screen.
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another device currently connected.